package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.utils.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.time.LocalDateTime;
import java.util.List;

/**
 * 分类业务层
 */
@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增分类
     * @param categoryDTO
     */

    public void save(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.DISABLE);

        categoryMapper.insert(category);



    }
    /**
     * 分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        //开始分页
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());

        Page<Category> page=  categoryMapper.pageQuery(categoryPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }
    /**
     * 根据id删除分类
     * @param id
     */

    public void deleteById(Long id) {

       Integer count = dishMapper.countByCategoryId(id);

       if (count>0)
       {
           //当前菜品有分类不能删除
           throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
       }

      //查询当前分类是否还关联了套餐,如果关联了套餐就抛出业务异常
       count= setmealMapper.countByCatgoryId(id);
        if (count>0)
        {
            //当前分类有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除分类数据
        categoryMapper.deleteById(id);
    }
    /**
     * 修改分类
     * @param categoryDTO
     */

    public void update(CategoryDTO categoryDTO) {

        Category category=new Category();
        //对象拷贝
        BeanUtils.copyProperties(categoryDTO,category);

        //设置修改时间修改人
        //category.setUpdateTime(LocalDateTime.now());
        //category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);

    }
    /**
     * 启用、禁用分类
     * @param status
     * @param id
     */

    public void startStop(Integer status, Long id) {

      Category category = Category.builder()
                .id(id)
                .status(status)
                .build();
      categoryMapper.update(category);

    }
    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    @Override
    public List<Category> list(Integer type) {

        return categoryMapper.list(type);
    }
}
